Tiêu đề 02. SEXUAL REPRODUCTION IN FLOWERING PLANTS.pdf ✅

#QID# 2976 (1.) The body of the ovule is fused within the funicle at[2020] (a) Micropyle (b) Nucellus (c) Chalaza (d) Hilum #QID# 2977 (2.) The plant parts which consist of two generations - one within the other[2020] (i) Pollen grains inside the anther (ii) Germinated pollen grain with two male gametes (iii) Seed inside the fruit (iv) Embryo sac inside the ovule (a) (i), (ii) and (iii) (b) (iii) and (iv) (c) (i) and (iv) (d) (i) only #QID# 2978 (3.) What type of pollination takes place in Vallisneria?[2019, Odisa] (a) Male flowers are carried by water currents to female flowers at surface of water. (b) Pollination occurs in submerged condition by water. (c) Flowers emerge above surface of water and pollination occurs by insects. (d) Flowers emerge above water surface and pollen is carried by wind. #QID# 2979 (4.) In which one of the following, both autogamy and geitonogamy are prevented?[2019, Odisa] (a) Maize (b) Wheat (c) Papaya (d) Castor #QID# 2980 (5.) What is the fate of the male gametes discharged in the synergid? [2019] (a) One fuses with the egg, other(s) degenerate(s) in the synergid. (b) All fuse with the egg. (c) One fuses with the egg, other(s) fuse(s) with synergid nucleus. (d) One fuses with the egg and other fuses with central cell nuclei. #QID# 2981 (6.) Pollen grains can be stored for several years in liquid nitrogen having a temperature of [2018] (a) −120 C
(b) −80 C (c) −160 C (d) −196 C #QID# 2982 (7.) Attractants and rewards are required for: [2017] (a) Entomophily (b) Hydrophily (c) Cleistogamy (d) Anemophily #QID# 2983 (8.) Flowers which have single ovule in the ovary and are packed into inflorescence are usually pollinated by:[2017] (a) Bee (b) Wind (c) Bat (d) Water #QID# 2984 (9.) A dioecious flowering plant prevents both :[2017] (a) Autogamy and geitonogamy (b) Geitonogamy and xenogamy (c) Cleistogamy and xenogamy (d) Autogamy and xenogamy #QID# 2985 (10.) Which one of the following statements is not true?[2016] (a) Tapetum helps in the dehiscence of anther (b) Exine of pollen grains is made up of sporopollenin (c) Pollen grains of many species cause severe allergies (d) Stored pollen in liquid nitrogen can be used in the crop breeding programmes #QID# 2986 (11.) Which of the following statements is not correct?[2016] (a) Pollen grains of many species can germinate on the stigma of a flower, but only one pollen tube of the same species grows into the style. (b) Insects that consume pollen or nectar without bringing about pollination are called pollen/nectar robbers. (c) Pollen germination and pollen tube growth are regulated by chemical components of pollen interacting with those of the pistil. (d) Some reptiles have also been reported as pollinators in some plant species. #QID# 2987
(12.) Which one of the following may require pollinators, but is genetically similar to autogamy?[2015 RS] (a) Xenogamy (b) Apogamy (c) Cleistogamy (d) Geitonogamy #QID# 2988 (13.) Which one of the following statements is not true?[2015 RS] (a) Pollen grains of some plants cause severe allergies and bronchial afflictions in some people (b) The flowers pollinated by flies and bats secrete foul odour to attract them (c) Honey is made by bees by digesting pollen collected from flowers (d) Pollen grains are rich in nutrients, and they are used in the form of tablets and syrups #QID# 2989 (14.) The hilum is a scar on the :[2015 RS] (a) Fruit, where it was attached to pedicel (b) Fruit, where style was present (c) Seed, where micropyle was present (d) Seed, where funicle was attached #QID# 2990 (15.) Which of the following are the important floral rewards to the animal pollinators?[2015 RS] (a) Nectar and pollen grains (b) Floral fragrance and calcium crystals (c) Protein pellicle and stigmatic exudates (d) Colour and large size flower #QID# 2991 (16.) Filiform apparatus is characteristic feature of:[2015 RS] (a) Nucellar embryo (b) Aleurone cell (c) Synergids (d) Generative cell #QID# 2992 (17.) Geitonogamy involves:[2014] (a) fertilization of a flower by the pollen from another flower of the same plant. (b) fertilization of a flower by the pollen from the same flower. (c) fertilization of a flower by the pollen from a flower of another plant in the same population. (d) fertilization of a flower by the pollen from a flower of another plant belonging to a distant population.
#QID# 2993 (18.) Male gametopyte with least number of cell is present in:[2014] (a) Pteris (b) Funaria (c) Lilium (d) Pinus #QID# 2994 (19.) Function of filiform apparatus is to:[2014] (a) Recognize the suitable pollen at stigma (b) Stimulate division of generative cell (c) Produce nectar (d) Guide the entry of pollen tube #QID# 2995 (20.) Megasporangium is equivalent to: [NEET 2013] (a) Fruit (b) Nucellus (c) Ovule (d) Embryo sac #QID# 2996 (21.) Advantage of cleistogamy is : [NEET 2013] (a) More vigorous offspring (b) No dependence of pollinators (c) Vivipary (d) Higher genetic variability #QID# 2997 (22.) Product of sexual reproduction generally generates:[NEET 2013] (a) Prolonged dormancy (b) New genetic combination leading to variation (c) Large biomass (d) Longer viability of seeds #QID# 2998 (23.) Which one of the following statements is correct?[NEET 2013] (a) Sporogenous tissue is haploid (b) Endothecium produces the microspores (c) Tapetum nourishes the developing pollen (d) Hard outer layer of pollen is called intine #QID# 2999 (24.) Which one of the following statements is correct?[NEET Kar. 2013]